US 12,264,047 B2
Mobile crane having a counterweight device
Heinz König, Biberach (DE); Peter Scheffold, Ochsenhausen (DE); and Tobias Haller, Schnürpflingen (DE)
Assigned to LIEBHERR-WERK EHINGEN GMBH, Ehingen/Donau (DE)
Filed by Liebherr-Werk Ehingen GmbH, Ehingen/Donau (DE)
Filed on Jun. 14, 2022, as Appl. No. 17/839,552.
Claims priority of application No. 202021106818 .3 (DE), filed on Dec. 15, 2021.
Prior Publication US 2023/0183047 A1, Jun. 15, 2023
Int. Cl. B66C 23/74 (2006.01)
CPC B66C 23/74 (2013.01) 16 Claims
OG exemplary drawing
 
1. A mobile crane having a travelable undercarriage, a superstructure rotatably supported on the undercarriage, and a counterweight device couplable to the superstructure, wherein the counterweight device comprises a carrier plate on which one or more counterweight elements are stacked, and at least one connection element extending upward from the carrier plate to a connection region that couples the carrier plate to the superstructure for the counterweight device to be lifted by the superstructure, wherein the at least one connection element has at least two separate and spaced apart placement areas on which the one or more counterweight elements are placed such that (a) the one or more counterweight elements are not in contact with the carrier plate, (b) weight of the one or more counterweight elements is introduced into the at least one connection element, and (c) no force from the weight of the one or more counterweight elements is introduced onto the carrier plate when lifted by the counterweight device,
wherein the at least one connection element includes at least two steps in a step structure with upper sides of the at least two steps forming multiple pairs of the at least two separate and spaced apart placement areas, the at least two steps forming the pairs of the at least two separate and spaced apart placement areas disposed at different heights above the carrier plate and disposed at different widths from a center of the at least one connection element with the at least two steps located closer to the carrier plate being wider than the at least two steps located farther from the carrier plate, each of the at least two steps for receiving and supporting different ones of the counterweight elements to be supported upon while the counterweight elements are stacked on the at least one connection element without contacting the carrier plate.